Open Tab Pane regarding Url in javascript

Question

Different topics are covered on the individual tabs. On the one are shown pictures on the next the menu card, etc..

I would now like to be able to select a specific tab with the url.

Example:
https://example.com/mypage -> Opens the page and the first tab.

https://example.com/mypage/tab2 -> Opens the page and the second tab.
or
https://example.com/mypage#tab2 -> Opens the page and the second tab.

This is my current code that I would like to modify:

document.getElementById("defaultOpen").click();

function openPane(evt, paneName) {
    // Declare all variables
    var i, tabpane, tablink;
  
    // Get all elements with class="tabpane" and hide them
    tabpane = document.getElementsByClassName("tabpane");
    for (i = 0; i < tabpane.length; i++) {
      tabpane[i].style.display = "none";
    }
  
    // Get all elements with class="s" and remove the class "active"
    tablink = document.getElementsByClassName("tablink");
    for (i = 0; i < tablink.length; i++) {
      tablink[i].className = tablink[i].className.replace(" active", "");
    }
  
    // Show the current tab, and add an "active" class to the button that opened the tab
    document.getElementById(paneName).style.display = "block";
    evt.currentTarget.className += " active";
  }

/* --- TABS HEADER & WRAPPER START --- */

.tabs {
  width: 100%;
  margin-top: 40px;
}

/* --- profile tab wrapper --- */

.profile-tab-wrapper {
  position: static;
  top: 0px;
  z-index: 999999999;
  display: flex;
  width: 100%;
  margin-top: 0px;
  padding-top: 0px;
  padding-bottom: 10px;
  clear: none;
  -webkit-box-pack: center;
  -webkit-justify-content: center;
  -ms-flex-pack: center;
  justify-content: center;
  -webkit-box-align: center;
  -webkit-align-items: center;
  -ms-flex-align: center;
  align-items: center;
  -webkit-box-flex: 0;
  -webkit-flex: 0 0 auto;
  -ms-flex: 0 0 auto;
  flex: 0 0 auto;
  border-top: 1px solid #d1d1d1;
  background-color: transparent;
}

/* --- tab link --- */

.tablink {
  position: static;
  display: flex;
  margin-top: -1px;
  border-top: 1px solid #d1d1d1;
  border-right: none;
  border-left: none;
  border-bottom: none;
  margin-right: 20px;
  margin-left: 20px;
  padding-top: 10px;
  padding-right: 0px;
  padding-left: 0px;
  -webkit-box-align: center;
  -webkit-align-items: center;
  -ms-flex-align: center;
  align-items: center;
  background: none;
  font-family: Montserrat, sans-serif;
  color: #d1d1d1;
  font-size: 13px;
  line-height: 13px;
  font-weight: 500;
  text-transform: uppercase;
  transition: 0.3s;
  cursor: pointer;
  outline: inherit;
}

.tablink.active {
  position: static;
  height: auto;
  margin-top: -1px;
  border-top: 1px solid #101010;
  background-color: transparent;
  font-family: Montserrat, sans-serif;
  color: #101010;
  font-size: 13px;
  line-height: 13px;
  font-weight: 500;
  text-transform: uppercase;
}

/* --- TABS HEADER & WRAPPER END --- */
/* --- TABS CONTENT WRAPPER START --- */

.content-wrapper {
  margin-top: 20px;
  width: 100%;
}

/* --- TABS CONTENT WRAPPER END --- */
/* --- TABS DISPLAY ON/OFF START --- */

.tabpane {
  display: none;
  animation: fadeEffect 1s;
}

/* --- TABS DISPLAY ON/OFF END --- */
/* --- LINKS TAB START --- */

/* --- titel --- */

.titel-wrapper {
  position: static;
  top: 0px;
  z-index: 999999;
  display: flex;
  width: 100%;
  margin-top: 20px;
  padding-top: 5px;
  padding-bottom: 5px;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -webkit-flex-direction: column;
  -ms-flex-direction: column;
  flex-direction: column;
  -webkit-box-pack: center;
  -webkit-justify-content: center;
  -ms-flex-pack: center;
  justify-content: center;
  -webkit-box-align: stretch;
  -webkit-align-items: stretch;
  -ms-flex-align: stretch;
  align-items: stretch;
  -webkit-box-flex: 0;
  -webkit-flex: 0 0 auto;
  -ms-flex: 0 0 auto;
  flex: 0 0 auto;
  background-color: hsla(0, 0%, 100%, 0.8);
  -webkit-backdrop-filter: blur(5px);
  backdrop-filter: blur(5px);
}

.titel {
  font-family: Montserrat, sans-serif;
  font-size: 18px;
  line-height: 22px;
  font-weight: 600;
  text-align: center;
  text-transform: uppercase;
}

/* --- button --- */

.button-wrapper {
  position: static;
  top: 0px;
  z-index: 999999;
  display: flex;
  width: 100%;
  margin-top: 0px;
  padding-top: 5px;
  padding-bottom: 0px;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -webkit-flex-direction: column;
  -ms-flex-direction: column;
  flex-direction: column;
  -webkit-box-pack: center;
  -webkit-justify-content: center;
  -ms-flex-pack: center;
  justify-content: center;
  -webkit-box-align: stretch;
  -webkit-align-items: stretch;
  -ms-flex-align: stretch;
  align-items: stretch;
  -webkit-box-flex: 0;
  -webkit-flex: 0 0 auto;
  -ms-flex: 0 0 auto;
  flex: 0 0 auto;
  background-color: hsla(0, 0%, 100%, 0.8);
  -webkit-backdrop-filter: blur(5px);
  backdrop-filter: blur(5px);
  text-decoration: none;
}

.button {
  padding-top: 15px;
  padding-bottom: 14px;
  border-style: solid;
  border-width: 1px;
  border-color: #101010;
  border-radius: 5px;
  background-color: #101010;
  outline-color: #101010;
  outline-offset: 0px;
  outline-style: none;
  outline-width: 1px;
  -webkit-transition: color 200ms linear, background-color 800ms cubic-bezier(.23, 1, .32, 1);
  transition: color 200ms linear, background-color 800ms cubic-bezier(.23, 1, .32, 1);
  font-family: Montserrat, sans-serif;
  color: #fff;
  font-size: 14px;
  line-height: 19px;
  text-align: center;
  text-decoration: none;
}

.button:hover {
  background-color: rgba(16, 16, 16, 0);
  color: #101010;
}

/* --- LINKS TAB END --- */
/* --- ABOUT TAB START --- */

.about-left {
  display: flex;
  margin-top: 10px;
  padding-top: 0px;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -webkit-flex-direction: column;
  -ms-flex-direction: column;
  flex-direction: column;
  -webkit-box-pack: start;
  -webkit-justify-content: flex-start;
  -ms-flex-pack: start;
  justify-content: flex-start;
  -webkit-box-align: start;
  -webkit-align-items: flex-start;
  -ms-flex-align: start;
  align-items: flex-start;
}

.about-center {
  display: flex;
  margin-top: 10px;
  padding-top: 0px;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -webkit-flex-direction: column;
  -ms-flex-direction: column;
  flex-direction: column;
  -webkit-box-pack: start;
  -webkit-justify-content: flex-start;
  -ms-flex-pack: start;
  justify-content: flex-start;
  -webkit-box-align: center;
  -webkit-align-items: center;
  -ms-flex-align: center;
  align-items: center;
}

.about-right {
  display: flex;
  margin-top: 10px;
  padding-top: 0px;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -webkit-flex-direction: column;
  -ms-flex-direction: column;
  flex-direction: column;
  -webkit-box-pack: start;
  -webkit-justify-content: flex-start;
  -ms-flex-pack: start;
  justify-content: flex-start;
  -webkit-box-align: end;
  -webkit-align-items: flex-end;
  -ms-flex-align: end;
  align-items: flex-end;
}

.about-titel {
  margin-top: 0px;
  padding-top: 0px;
  padding-bottom: 0px;
  font-family: Montserrat, sans-serif;
  font-size: 14px;
  line-height: 19px;
  font-weight: 600;
  text-align: center;
  text-transform: none;
}

.about-text {
  margin-top: 0px;
  margin-bottom: 0px;
  padding-top: 0px;
  padding-bottom: 0px;
  font-family: Montserrat, sans-serif;
  font-size: 12px;
  line-height: 14px;
  font-weight: 400;
  text-align: center;
  text-transform: none;
}

/* --- ABOUT TAB END --- */
/* --- NO CONTENT START --- */

.nocontent-header {
  margin-top: 20%;
  padding-top: 1px;
  padding-bottom: 1px;
  font-family: Montserrat, sans-serif;
  font-size: 12px;
  line-height: 12px;
  font-weight: 600;
  text-align: center;
  text-transform: uppercase;
}

.nocontent-subhead {
  margin-top: 0px;
  margin-bottom: 0px;
  padding-top: 1px;
  padding-bottom: 1px;
  font-family: Montserrat, sans-serif;
  font-size: 12px;
  line-height: 14px;
  font-weight: 300;
  text-align: center;
  text-transform: none;
}

/* --- NO CONTENT END --- */

<div class="tabs">

        <div class="profile-tab-wrapper">

          <button class="tablink active" onclick="openPane(event, 'Links')" id="defaultOpen">LINKS</button>

          <button class="tablink" onclick="openPane(event, 'Images')">IMAGES</button>


          <button class="tablink" onclick="openPane(event, 'About')">ABOUT</button>

        </div>


        <div class="tabs-content">
          
          <div id="Links" class="tabpane">
            <div class="content-wrapper">

              <div class="titel-wrapper">
                <div class="titel">Titel 1</div> <!-- Insert Titel -->
              </div>

              <div class="button-wrapper">
                <a class="button" href="https://example.com" target="_blank">
                  <div>Link 1</div>
                </a>
              </div>

            </div>
          </div>

          <div id="Images" class="tabpane">
            <div class="content-wrapper">

              <div class="nocontent-header">There are no images yet</div>
              <div class="nocontent-subhead">When something is uploaded, you will see it here.</div>

            </div>
          </div>

          <div id="About" class="tabpane">
            <div class="content-wrapper">

              <div class="about-center">
                <div class="about-titel">This is a titel</div>
                <div class="about-text">This is some text</div>
              </div>

            </div>
          </div>

        </div>
      </div>

How to implement this with a domain extension?